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wloop

The store migrates forward

  • Context: a user’s store holds work that cannot be recreated.
  • Decision: every schema change is a new version with a migration, run after a backup, and a store newer than the binary is refused.
  • Consequence: wloop store restore takes a store back to a backup; a migration in a release is never edited.
  • Enforced by: TestSchemaSQLIsFrozenAtSchemaVersion, TestMigrationsAreOneVersionEachUpToSchemaVersion, TestEveryReleasedSchemaMigratesToSchemaSQL, TestNewerStores, which fail on a schema change without a migration. See Changing the store’s schema.